Dockerfile

# Multi-stage build for production
FROM node:20-alpine AS base

# Install dependencies only when needed
FROM base AS deps
WORKDIR /app

# Copy package files
COPY package*.json ./
COPY server/package*.json ./server/
COPY client/package*.json ./client/

# Install dependencies
RUN npm ci --only=production && \
    cd server && npm ci --only=production && \
    cd ../client && npm ci --only=production

# Build stage
FROM base AS builder
WORKDIR /app

# Copy source code
COPY . .

# Build client
WORKDIR /app/client
RUN npm ci && npm run build

# Production stage
FROM base AS runner
WORKDIR /app

# Create non-root user
RUN addgroup --system --gid 1001 nodejs
RUN adduser --system --uid 1001 nextjs

# Copy built application
COPY --from=builder /app/client/build ./client/build
COPY --from=deps /app/node_modules ./node_modules
COPY --from=deps /app/server/node_modules ./server/node_modules

# Copy server files
COPY server/ ./server/

# Set permissions
RUN chown -R nextjs:nodejs /app
USER nextjs

# Expose port
EXPOSE 8080

# Health check
HEALTHCHECK --interval=30s --timeout=3s --start-period=5s --retries=3 \
  CMD curl -f http://localhost:8080/health || exit 1

# Start application
CMD ["node", "server/server.js"]